Analysis and Control of Three Phase Multi level Inverters with Sinusoidal PWM Feeding Balanced Loads Using MATLAB

Multi level inverters are becoming very attractive for industries due to their high power rating, high voltage rating and high efficiency is achieved without transformer. These also improves the overall performance of the system as these produces fewer harmonics. As the number of levels increases the quality of voltage waveform is also increases. In this paper the analysis of Three Phase Diode Clamped Multi Level Inverter has been carried out in MATLAB/Simulink for different levels (3, 5 and 7) at varying loads. Diode-Clamped topology for Multi level inverter (DC-MLI) for different levels are analyzed in the terms of THD contents for output voltage and as well in output current. Sinusoidal PWM Technique is used to generate the gate pulses. The simulation of three phase three level, five level and seven level inverters is done in Matlab/Simulink.